FishNet offers Linux server administration services for dedicated servers. We typically begin by setting up a nightly virus scan of the web site; while this will not catch all PHP infections, it can catch many of the more common ones.
We also set up the fail2ban service to block excessive login attempts to various services, such as SSH, SMTP, POP3, IMAP, and even WordPress login hammering.
We also install a root kit scanner to monitor the system level areas of the server.
This service includes reviewing the nightly server log, virus scan results, nightly patch update results, and any results of the root kit scan. Some updates of system level files can occasionally cause false positives on the root kit scan, and it is important to correlate those to the patch updates.
Since this service varies for each situation, please feel free to contact us for further discussion about your particular requirements.